Homework Help: physics

Posted by Anonymous on Friday, February 26, 2010 at 12:57am.

A 22.0-kg box rests on a frictionless ramp with a 14.1° slope. The mover pulls on a rope attached to the box to pull it up the incline. If the rope makes an angle of 38.4° with the horizontal, what is the smallest force F the mover will have to exert to move the box up the ramp?

physics - drwls, Friday, February 26, 2010 at 3:13am
Since there is no friction, all you have to do is balance the component of the tow-rope force in the uphill direction against the component of the weight in the downhill direction.

Draw yourself a figure. That should help show you what angle sines and cosines to use.

Further assistance will be provided if you show your work.

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